path: root/ipc.mdwn
diff options
authorThomas Schwinge <>2010-12-13 20:22:52 +0100
committerThomas Schwinge <>2010-12-13 20:22:52 +0100
commit4eea3efc13acccfb613571f604f17e0ec68e5bed (patch)
tree9c72a7790d6eb1602614971853131e3cc3f68174 /ipc.mdwn
parentcfccdc1bdbee7fb25ef0aa9639a3ffec926bf690 (diff)
``Some'' Mach documentation.
Parts have been rescued from 4b382d8daa5a9e2d54e78c18beeff76bc54dc16b:Mach/MachConcepts.mdwn.
Diffstat (limited to 'ipc.mdwn')
1 files changed, 9 insertions, 6 deletions
diff --git a/ipc.mdwn b/ipc.mdwn
index 2f9cef2e..ff9a166c 100644
--- a/ipc.mdwn
+++ b/ipc.mdwn
@@ -1,16 +1,17 @@
-[[!meta copyright="Copyright © 2007, 2008 Free Software Foundation, Inc."]]
+[[!meta copyright="Copyright © 2007, 2008, 2010 Free Software Foundation,
[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
id="license" text="Permission is granted to copy, distribute and/or modify this
document under the terms of the GNU Free Documentation License, Version 1.2 or
any later version published by the Free Software Foundation; with no Invariant
Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
-is included in the section entitled
-[[GNU Free Documentation License|/fdl]]."]]"""]]
+is included in the section entitled [[GNU Free Documentation
-IPC stands for interprocess communication.
+*IPC* stands for *inter-process communication*.
-On [[Unix]], interprocess communication can be achieved using pipes.
+On [[Unix]], inter-process communication can be achieved using pipes.
This is inefficient for large amounts of data as the data must be
copied. This is generally not a problem as most services are
provided by the Unix kernel and Unix is not designed to be
@@ -22,12 +23,14 @@ of many components. As components are separated by their respective
examine and modify the caller's state. The advantage is that if the
protocol is carefully designed, the callee cannot cause the caller
any [[destructive_interference]] thereby removing the need for the
-caller to [[trust]] the callee thus reducing the former's [[tcb]].
+caller to [[trust]] the callee thus reducing the former's [[TCB]].
When done systematically, this can increase the system's [[robustness]].
To this end, microkernels provide richer IPC semantics that include
the ability to transfer [[capabilities|capability]] and to use [[virtual_memory]]
[[mechanism]]s to copy data.
+Continue reading about [[Mach's IPC system|microkernel/mach/IPC]].
# See Also